Question

During electrolysis of aqueous NaCl, the product obtained at cathode is ____________.

विकल्प

• H_2(g)

• Cl_2(g)

• H₂O_(g)

• O_2(g)

Answer 1

During electrolysis of aqueous NaCl, the product obtained at cathode is H_2(g).

Explanation:

At anode, Oxidation \[\ce{2Cl^-_{( aq)} -> Cl2_{(g)} + 2e^-}\]

At cathode, Reduction \[\ce{2H2O_{(l)} + 2e^- -> H2_{(g)} + 2OH^-_{( aq)}}\]

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\[\ce{2Cl^-_{( aq)} + 2H2O_{(l)} -> Cl2_{(g)} + H2_{(g)} + 2OH^-_{( aq)}}\]

Hence, H_2(g) obtained at cathode.